Shedding mechanism for looms.



No. 695,609. Patented Mar. I8, |902.

B. HILBERT. Y

SHEDDING MECHANISM FOR LMS. (Application filed Aug. 7, 1897.) (No Model.) 2 Sheets-Sheet I.

No. 695,909. Patented Mar. la, |902..

VB. HILBERT.

SHEDDING MECHANISNI FUR LO0MS.

(Application led Aug. 7, 1897.) (No Model.) 2 Sheets-Sheet 2.

zo lower reciprocating knife.

UNITED f STATESv "PATENT OFFICE.

BAPTIST-n nILBnRr, or' WORCESTER, MASSACHUSETTS.

S'HEDDING NlECHANlSM FORLOOMS.. v

, v SPECIFICATIQN forming part of Letters Application filed August 7,

To zz/Z who/n, it may concern:

Be it known that LBAPTISTE HILBERT,a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have inventeda new and u seful Improvement in Shedding Mechanism for Looms, of which the following'is a specification, accompanied by drawings forming a part of the same, in which- Figure 1 represents a side view of the shedding mechanism of a loom., Fig. 2 is a side View of the same with the' frame on the side next the beholder removed in order to disclose the operating mechanism. Fig. 3 is a x5 side view of 'the shedding' mechanism, show# ing the side opposite that shown in Fig. l. Fig. 4 represents a portion of the shedding mechanism,- showing one of, the sliding jacks in its lowest position and" engagedby thef Fig. 5 represents" a portion of the shedding mechanism, showing the jack in its central .position and disengaged from both upper and lower reciprocating knives. Fig. 6.is a similar View showing the jack in its highest position and engaged by the upper reciprocating. knife; and Fig. 7 represents, on a larger scale, the spring-ac- Y tnated sliding pin by which the inner ends of the jacks are lifted.

Similar letters and reference-figures refer to similar parts in the different figures.

Referring to the drawings, Adenotes a portion of the framework forming the head of a loom and supporting the shedding mechan- `3 5 ism, said framework consisting of two similar side frames, between which' is locatedthe operative mechanism for raisingvand lowering the harness-frames. J onrnaled in the frame-- work A is a horizontal shaft 1, which is ro- 4o tated from the crank-shaft 2 by means of the vertical shaft'3 andbeveledgears 4 and-5..

The shaft V1 carries upon one end'a crankplate 6, which is connected by a link 7 with 'a lever 8, attached to a rocking shaft 9, having a similar lever 10 upon its opposite end.

The levers' 8 and 10 have their upper ends connected by links 11 with the upper knifebar 12, and their lower ends are connected by links 13 with the lowerknife-bar 14C, so that 5o the oscillation of the levers 8 and 10 will impart a reciprocating motion to the knife-bars 12 and 11i in horizontal slots 15 and 16. Be-

f tween'the upper and lower knife-bars: 12 and 14 are arranged a series lof jacks 17, lyingin i' Patent No. 695,609, dated March 18,1902.

sentinella/125. naman.: v

alrod 26, held in the frame A.

enyds 27,139 which are attached` the harnessstraps 28 and 29, connecting `the hell-cranks 25 with the harness-frames (not shown) of the loom in the usual and well-known manner. Journaled in horizontal bearings in the frame pattern-chain 31, consisting of a series of spindles 32, having their ends united by the links 33 of an endless chain and carrying a series of rolls 34: and a series of larger rolls upon the spindles 32, so as to be carried betated.

36, the familiar mechanical movement known as the Geneva stop-motion,""by which the pattern-chain roll is locked in position be- 17 rests by gravity u pon the pattern-chain, and

gaged bythe larger rolls 3 5 will be raised high enough to have their upper notches 18 engaged by the upper `reciprocating knife-bar 12, and those jacks which rest upon the spindles 32 will be allowed to fall low enough to bring their lower notches 19 into engagement Each of the gezin-wheelsy 21 is yThe arms of the bell-cranks '25 have notched neath the jack 17 as the pattern-chain is ro- Y v An intermittent rotary motion isgiven to the pattern-'chain roll 30 by 'means of a 'star'- wheel 36, carried upon the pattern-roll shaft-, and a driving-wheel 37, carried upon lthe shaft 1 and provided with spurs 38 and segar mental faces 39, forming, with the star-wheel tween eachmovement The vhorizontal jack as lille spindles 32 tre glhcessively brought' beneath the jacks those jacks which are en- I nected by means of a link 24 withthelverti- 'cal arm of a bell-crank 25, which roel'zsrupon i.

A f A is a pattern-chain roll 30, which carries a,y

35, about twice the'diameter of the smaller rolls 34. The rolls 31' and 35 are arranged IOO with the lower reciprocating knife-bar 14, while those jacks which are supported upon the smaller series of rolls 34 will be held midway between the upper and lower reciprocating knife-bars 12 and 1L and ont of engagement with both.

The operative mechanism is so timed that when the upper and lower reciprocating knife-bars 12 and 14: are at either end of their travel the intermittent movement of the pattern-chain will be completed, bringing one of thespindles32 directlybeneaththejacks17,so as to carry them eitherinto their upper, lower, or intermediate position, in accordance with the arrangement of the rolls, thereby carrying such of thejacks as are to be moved by the upper knife-bar into engagement therewith, and such of the jaclfs as are to be moved b y the lower knife-bar are allowed to fall into en` gagement therewith, while those jacks which are to remain at rest are held upon the smaller rolls 34 in an intermediate position between the two knife-bars. Stop-rods 40 are held in the frame A beneath the radial arms 23 and slightly below the axis of the gears 2l, so as to check the rotation of the gear-wheels, and the radial arms areheld in close contact with the stop-rods 40 by means of the pullingsprings 4l, which connect the links 24 with the lower arms of the bell-cranks 25.

A cross-bar 42 extends beneath the inner ends of the jacks 17 and.supports a series of sliding pins 43, which are pushed up against' the inner ends of the jacks by means ot' spiral springs 4:4 in order to odset the weight of the inner ends of the jacks and insure the engagement of 'the jacks with the lower knifebar, the pressure of the spring-actuated pins 43 causing the jacks to be rocked upon a fixed bar 45, which supports the jacks immediately beneath the gear-wheels 2l. In Figs. 4f, 5, and 6 I have represented the three positions assumed by the jacks as they are controlled by the movement of the pattern-chain and illustrating the motion of the jacks upon the fixed bar 45.

The notches 18 and 19 in the jacks 17 are provided with shoulders at each end of the notches, so that the jacks are capable of being movedI in either direction by the engagement of their notches with a reciprocating 'knife-bar. For example, the jack shown in Fig. 4 is represented as engaged with the lower knife-bar 14, so it will be carried outward by the next movement of the knife-bar 14; butin case at the time of changing the pattern-chain knife-bar l2 was at the inner end of its slot 15 then the jack would be moved out by being raised, carrying the notch 18 into engagement with the upper knife-bar.

A simultaneous reeiprocation ot the upper and lower knife-bars 12 and 14 is made at each pick of the loom,the upper bar12 moving in one direction and the lower bar 14 in the opposite direction at one pick,with their motions reversed at .the next succeeding pick, so that any of the jacks can be moved at every pick of the loom by simply holding it continuously in engagement with either the upper' `and slower speed for the same speed of the loom, obviatiug the necessity of a quick return movement of the knife-bars.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination with a series of sliding jacks provided with rack-teeth, of segmental gears engaging said rack-teeth,harn ess-frame levers operatively connected with said gears, and a series of spring-actuated pins applied beneath the inner ends of said sliding jacks to counterbalance the weight of said inner ends, substantially as described.

2. The combination of a series of rocking segmental gears, fixed pins by which their motion is limited; sliding-'jacks provided with rack-teeth engaging said segmental gears, radial arms projecting from said gears, a series of bell-crank levers operatively connected with the harness-frames, links connecting one of the arms of said bell-crank levers with the radial arms of said gears, and springs connecting said links with the'onter arms of said bell-crank levers, whereby said gears are held against said fixed pins at each end of their movement, substantially as described.

3. The combination of a series of rocking segmental gears, toothed jacks'engaging said gears, reciprocating knife-bars engaging said jacks, a transverse supporting-bar beneath said jacks, spring actuated pins bearing against the inner ends of said jacks on one side of said transverse supporting-bar in order to counterbalance said inner ends of the jacks and depress the outer ends, substantially as described. 1 Dated this 31st day of July, 1897.

BAPTISTE HILBER'I.-

lVitnesses:

RUFUs B. FoWLEn, M. C. PRICE.

IOC 

